30000 MI or 48000 KM

Lubricate
    Transfer Case
      Lubricate linkage.
    Suspension
      Lubricate suspension components and other chassis components if applicable..
    Steering
    Drive/Propeller Shaft
      Lubricate daily if operated in water.
    Brakes and Traction Control
      Lubricate body actuating mechanisms.
    Body and Frame
      Lubricate body actuating mechanisms.
Clean
    Crankcase Filter
      Clean/oil.
    Carburetor
      Clean carburator choke shaft, fast idle cam and pivots.
    Air Filter Element
      Heavy Duty Service Interval.
Check
    Wheels
      Check torque on wheel lugs, steering linkage and spring clip nuts.
    Power Steering Fluid
      Check fluid level.
    Positive Crankcase Ventilation
    Fluid - Transfer Case
      Check fluid level.
    Fluid - M/T
      Check fluid level.
    Fluid - Differential
      Check fluid level.
    Fluid - A/T
      Light Duty Cycle
    Exhaust Gas Recirculation
      Check EGR system and clean passages.
    Brake Master Cylinder
      Check fluid level.
Inspect
    Wheel Bearing
      Except 44F-BJ & 60F front differentials. Also clean & repack front spindle needle bearings as required & when replacing front disc pads.
Replace
    Oil Filter, Engine
    Engine Oil
      If your mileage is less the 7,500 miles a yearly, replace the engine oil filter at each oil change.